how can I convert my duplication Xaml code into C# code to prevent it from duplication

here is my Xaml

   <customRenderes:NavigationImageButton 
   Source="IconFAB"
   Command="{Binding AddCommand}"
   AbsoluteLayout.LayoutFlags="PositionProportional"
   AbsoluteLayout.LayoutBounds="1.0,1.0,-1,-1"
   Margin="10"
   Opacity="0.4"/>

I need to convert this into C# code in order to add this to My basecontent customer page I created in order to prevent the duplication